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synapse/changelog.d/15695.bugfix

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Check required power levels earlier in createRoom handler. (#15695) * Check required power levels earlier in createRoom handler. - If a server was configured to reject the creation of rooms with E2EE enabled (by specifying an unattainably high power level for "m.room.encryption" in default_power_level_content_override), the 403 error was not being triggered until after the room was created and before the "m.room.power_levels" was sent. This allowed a user to access the partially-configured room and complete the setup of E2EE and power levels manually. - This change causes the power level overrides to be checked earlier and the request to be rejected before the user gains access to the room. - A new `_validate_room_config` method is added to contain checks that should be run before a room is created. - The new test case confirms that a user request is rejected by the new validation method. Signed-off-by: Grant McLean <grant@catalyst.net.nz> * Add a changelog file. * Formatting fix for black. * Remove unneeded line from test. --------- Signed-off-by: Grant McLean <grant@catalyst.net.nz>
2023-06-07 09:21:25 -06:00
Check permissions for enabling encryption earlier during room creation to avoid creating broken rooms.